Inventor · disambiguated record
Hirofumi Muratani
Also filed as: MURATANI HIROFUMI
38 granted patents·15 pending applications·1,581 citations·filing 1993–2017
98Inventor score
Top patents by PatentIndex Score
53 records- 0196US6901515B1Code generating method and unit thereof, code detecting method and unit thereof, and watermark embedding unit and watermark detecting unitTOSHIBA KK·Filed 2000·Granted May 31, 2005·75 cites·13 claims
- 0296US6061451AApparatus and method for receiving and decrypting encrypted data and protecting decrypted data from illegal useDIGITAL VISION LAB CORP·Filed 1997·Granted May 9, 2000·361 cites·39 claims
- 0394US5968175ASoftware use method control systemTOSHIBA KK·Filed 1997·Granted Oct 19, 1999·196 cites·10 claims
- 0493US6768807B1Digital watermark embedding device, digital watermark detection device, digital information distribution device, and, storage mediumTOSHIBA KK·Filed 2000·Granted Jul 27, 2004·89 cites·17 claims
- 0590US7194090B2Encryption apparatus, decryption apparatus, expanded key generating apparatus and method therefor, and recording mediumTOSHIBA KK·Filed 2001·Granted Mar 20, 2007·60 cites·24 claims
- 0687US6952486B2Digital watermark embedding method and apparatus, and digital watermarkTOSHIBA KK·Filed 2004·Granted Oct 4, 2005·35 cites·21 claims
- 0785US7209556B2Encryption apparatus and method, and decryption apparatus and method based on block encryptionTOSHIBA KK·Filed 2005·Granted Apr 24, 2007·12 cites·11 claims
- 0884US5572710AHigh speed logic simulation system using time division emulation suitable for large scale logic circuitsTOSHIBA KK·Filed 1993·Granted Nov 5, 1996·126 cites·26 claims
- 0983US7082537B2Code generating method and unit thereof, code detecting method and unit thereof, and watermark embedding unit and watermark detecting unitTOSHIBA KK·Filed 2004·Granted Jul 25, 2006·17 cites·3 claims
- 1081US7227948B2Encryption apparatus and method, and decryption apparatus and method based on block encryptionTOSHIBA KK·Filed 2001·Granted Jun 5, 2007·29 cites·18 claims
- 1180US6741723B2Digital watermark embedding method and apparatus, and digital watermarkTOSHIBA KK·Filed 2002·Granted May 25, 2004·23 cites·5 claims
- 1278US6757405B1Digital watermark embedding device, digital watermark detection device and recording medium recording computer readable program for realizing functions of two devicesTOSHIBA KK·Filed 1999·Granted Jun 29, 2004·73 cites·16 claims
- 1377US6983059B2Digital watermark detecting device and method thereofTOSHIBA KK·Filed 2001·Granted Jan 3, 2006·13 cites·19 claims
- 1475US5832229AMulticast communication system allows user to join or leave multicast groups and specify communication quality using easily comprehensible and operable user terminal displayTOSHIBA KK·Filed 1996·Granted Nov 3, 1998·98 cites·23 claims
- 1572US7305085B2Encryption apparatus and method, and decryption apparatus and method based on block encryptionTOSHIBA KK·Filed 2001·Granted Dec 4, 2007·17 cites·9 claims
- 1671US6163799ACommunication navigation system which easily finds person who is interested in the same topicTOSHIBA KK·Filed 1998·Granted Dec 19, 2000·60 cites·26 claims
- 1769US8782114B2Arithmetic deviceYONEMURA TOMOKO·Filed 2012·Granted Jul 15, 2014·3 cites·5 claims
- 1869US8543630B2Exponentiation calculation apparatus and method for calculating square root in finite extension fieldTOSHIBA KK·Filed 2013·Granted Sep 24, 2013·2 cites·22 claims
- 1969US7826637B2Digital watermark embedding apparatus, digital watermark detecting apparatus, digital watermark embedding method, digital watermark detecting method and computer program productTOSHIBA KK·Filed 2006·Granted Nov 2, 2010·2 cites·29 claims
- 2069US7123744B2Digital watermark embedding method, digital watermark embedding apparatus, digital watermark detecting method, and digital watermark detecting apparatusTOSHIBA KK·Filed 2002·Granted Oct 17, 2006·17 cites·9 claims
- 2169US7099493B2Digital watermark detecting device and method thereofTOSHIBA KK·Filed 2005·Granted Aug 29, 2006·2 cites·19 claims
- 2269US6119109AInformation distribution system and billing system used for the information distribution systemDIGITAL VISION LAB CORP·Filed 1997·Granted Sep 12, 2000·208 cites·37 claims
- 2368US9509492B2Authentication device, output device, verification device and input deviceTOSHIBA KK·Filed 2014·Granted Nov 29, 2016·3 cites·20 claims
- 2468US7646882B2Digital watermark embedding apparatus, method and program, and digital watermark detection apparatus, method and programTOSHIBA KK·Filed 2003·Granted Jan 12, 2010·13 cites·22 claims
- 2567US8675874B2Apparatus for performing data compression processing using algebraic torusMURATANI HIROFUMI·Filed 2009·Granted Mar 18, 2014·4 cites·8 claims
- 2665US8438205B2Exponentiation calculation apparatus and method for calculating square root in finite extension fieldYONEMURA TOMOKO·Filed 2009·Granted May 7, 2013·3 cites·22 claims
- 2765US7613320B2Digital watermark embedding apparatus and method, and digital watermark analysis apparatus, method and programTOSHIBA KK·Filed 2008·Granted Nov 3, 2009·1 cites·12 claims
- 2865US6804375B2Electronic watermark detection apparatus and methodTOSHIBA KK·Filed 2001·Granted Oct 12, 2004·16 cites·16 claims
- 2962US7443999B2Digital watermark embedding apparatus and method, and digital watermark analysis apparatus, method and programTOSHIBA KK·Filed 2003·Granted Oct 28, 2008·4 cites·10 claims
- 3062US7346777B2Identification information embedding apparatus and identification information analysis apparatusTOSHIBA KK·Filed 2003·Granted Mar 18, 2008·5 cites·23 claims
- 3161US8934631B2Decompressing apparatus and compressing apparatusHANATANI YOSHIKAZU·Filed 2011·Granted Jan 13, 2015·2 cites·5 claims
- 3261US8233616B2Apparatus and computer program product for performing data compression processing using algebraic torusMURATANI HIROFUMI·Filed 2009·Granted Jul 31, 2012·2 cites·8 claims
- 3361US7578000B2Rendering device, recording device, copy control method, and programTOSHIBA KK·Filed 2002·Granted Aug 18, 2009·4 cites·5 claims
- 3459US8924448B2Arithmetic device, method, and program productISOGAI TAICHI·Filed 2012·Granted Dec 30, 2014·2 cites·15 claims
- 3559US8533243B2Representation converting apparatus, arithmetic apparatus, representation converting method, and computer program productYONEMURA TOMOKO·Filed 2009·Granted Sep 10, 2013·2 cites·25 claims
- 3659US7624273B2Code generating method and unit thereof, code detecting method and unit thereof, and watermark embedding unit and watermark detecting unitTOSHIBA KK·Filed 2004·Granted Nov 24, 2009·2 cites·16 claims
- 3750US2007266255A1Identification information embedding apparatus and identification information analysis apparatusMURATANI HIROFUMI·Filed 2007·Application pending·0 cites
- 3849US2005154893A1Method for embedding codes, method and apparatus for restoring identification informationFiled 2004·Application pending·0 cites
- 3948US2009183258A1Pirate user detecting apparatus, collusion-secure code generating apparatus, and collusion-secure code generating programTOSHIBA KK·Filed 2008·Application pending·0 cites
- 4047US2010046741A1Apparatus, method, and computer program product for decrypting, and apparatus, method, and computer program product for encryptingTOSHIBA KK·Filed 2009·Application pending·0 cites
- 4147US2010046746A1Parameter generating device and cryptographic processing systemTOSHIBA KK·Filed 2009·Application pending·0 cites
- 4247US2009207999A1Decryption processing apparatus, system, method, and computer program productTOSHIBA KK·Filed 2008·Application pending·0 cites
- 4347US2010046745A1Encrypting apparatus, decrypting apparatus, cryptocommunication system, and methods and computer program products thereforTOSHIBA KK·Filed 2009·Application pending·0 cites
- 4446US2007255956A1Identification information embedding apparatus and identification information analysis apparatusMURATANI HIROFUMI·Filed 2007·Application pending·0 cites
- 4546US2014337403A1Computing device, computing method, and computer program productTOSHIBA KK·Filed 2014·Application pending·0 cites
- 4645US9280518B2Public key cryptography computing deviceYONEMURA TOMOKO·Filed 2012·Granted Mar 8, 2016·0 cites·3 claims
- 4745US2002071593A1Digital watermark embedding apparatus, digital watermark detecting apparatus, digital watermark embedding method, digital watermark detecting method and computer program productFiled 2001·Application pending·0 cites
- 4844US2007098151A1Cryptographic protocol security verification apparatus, cryptographic protocol design apparatus, cryptographic protocol security verification method, cryptographic protocol design method and computer program productTOSHIBA KK·Filed 2006·Application pending·0 cites
- 4943US2005086484A1Identification information embedding apparatus, analysis apparatus, embedding method, analysis method and programTOSHIBA KK·Filed 2004·Application pending·0 cites
- 5042US6985602B2Electronic watermark detection apparatus and methodTOSHIBA KK·Filed 2004·Granted Jan 10, 2006·0 cites·16 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →